Storms and Volcanoes : Preservation of Catastrophic Events in the Tanjung Layar Outcrop, Bayah, Banten, Indonesia
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Abstract
A detailed analysis of sedimentology, stratigraphy, and general biostratigraphy of the early Miocene Bayah area in Tanjung Layar outcrop indicates that the depositional environment of the area is shoreface. Three principal facies associations were defined within the sedimentary record of the Tanjung Layar outcrop based on petrography and observed sedimentary structures : i) storm beds, ii) lithic conglomerates, and iii) volcaniclastic deposits. Lithic conglomerates and volcaniclastic deposits are interpreted as debris flows derived from subaerial and subaqueous material. From thin sections, the immature volcanic material consists of feldspar, quartz, plagioclase, some opaques, and lithic fragments. Locally, bioturbated storm beds can have good reservoir potential in the Tanjung Layar area.
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Copyright © 2008 Department of Geology, Faculty of Science, Chulalongkorn University. Parts of an article can be photocopied or reproduced without prior written permission from the author(s), but due acknowledgments should be stated or cited accordingly.
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